Process of making metal paper in endless strips.



No. 676,357. Patented lune ll, l90l. C. ENDRUWEIT.

PROCESS OF MAKING METAL PAPER IN ENDLESS STRIPS.

(Application filed. Dec. 31, 891) (No Model.)

2 Sheets$heat l.

No. 676,557. Patented lune I90l.

c. aunnuwm.

PROCESS OF BRAKING METAL PAPER IN ENDLESS STRIPS.

(Application filed Dec. 31, 1897.)

(No Model.) 2 Sheets-Sheet z.

UNITED STATES PATENT OFFIcE.

QARL ENDRUWEIT, OF BERLIN, GERMANY;

I PROCESS OFM'AKING' METAL PAPERAIN ENDLESS STRIPS,

SPECIFICATION forming part of Letters was No. (576.357, dated June 111901. I

Application flied December 81, 1897. Serial No. 6 65,260- (N model-l Toall whom it may concern:

Beitknown that LCARL ENDRUWEIT, a subject of the Emperor of Germany,residing at Berlin, Germany, have invented certain new and usefulImprovements in Galvanic Processes for Making Metal Paper in EndlessStrips; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and. use

the same.

[this invention relates to a process for producing-metallic depositsupon paper. This metal paper, as it is called, has heretofore been madeonly in singlesheets of certain sizes---as, for instance, described inUnited States Patent No. 51 0,0l3'-and consequently its production hasbeen small and its use confined to certain limits. A The object of thepresent invention is to provide a method and means for producing metalpaper-in endless rolls or strips of any desired dimensions or designs.In order to carry my invention into practice, I employ a simpleapparatus, which is illustrated in its preferred form in theaccompanying drawings, wherein-- Figure 1 is a perspective View of oneend of the apparatus, showing the component parts thereof; and Fig. 1 isa similar view of the opposite end.

The ordinary plates used heretofore in the production of metal paper arehere dispensed with, an endless metal band B being substituted therefor,which is guided over a number of insulated rolls R, suitably arranged ina frame. The width of said metal band corresponds to the width of themetal paper to be produced. The outer surface of said metal band B maybesmooth or may contain any suitable and appropriate design to betransferred upon the paper, or it may be provided with a high polish andmay be burnished or lightly engraved or impressed to present designs ofall kinds. A continuous revolving motion is imparted to the rolls R fromany suitable source, whereby the metal band B is moved in the directionindicated by the arrow. This motion may be accelerated at will byincreasing the speed of the guide-rollers R more or less, according'tothe metallic deposits intended for the paper.

During the travel of the metal band B it passes at first in front of asuitable polishing or grinding device S, which removesan y unevenness orstains. Then the bandpasses around the guide-roller R and over tank F,containing a solution of dou ble sulfid of alkali-for.instance, fiveparts of' alkalimetal trisulfid and one hundred parts of water. In saidtank a brush-cylinder X, lined with tufts of long and soft hair, is soarranged that it .is immersed as it rotates in the liquid and moistensthe under side of the metal band B with the solution continually. Theobject of moistening the band with this solution is to obtain a sulfidlayer upon the polished band not perceptible to the eye, said layeracting as acondncting medium. The band next passes over a wiper Z, ofrubber or other suitable material, which removes any excess of moisture.The band is then carefully rinsed by passing over a suitable rinsingdevice V, the wiper serving as a guard to prevent the water from runninginto the tank F. Thereupon the band in passing over suitably-arrangedrollers R is immersed in a nickel-bath N, where the band receives a verythin layer of nickel. The band is next imraining the copper-bath islonger than that of the nickel-bath mentioned, the copper layerdeposited is relatively thicker than the nickel ayer. forcement for thethin nickel layer. The anode-plates A in these baths are shaped corresponding to the manner in which the band is guided and are directlyconnected with a battery or other source of current. When the metal bandis past the last of the baths, it is thoroughly scraped or cleaned bymeans of a brush 0. Here also is seen a second wiper Z, which leadsbackany excess of liquid into the tank K. It also prevents the water used inthe washing from entering said tank. After its second washing the bandpasses beneath a glue-boiler L, which is heated by steam in any suitablemanner,and is provided with any suitable means, as brush P, for applyingthe agglutinant. -I preferably add to the latter a solution ofhydrosulfid of ammonia, mer= captan, or allyl sulfid. This'is valuable,as either of these solutions has a peculiar aflinity for metal andcauses the metal deposit to rig idly adhere to the paper. Theagglutinant This copper layer serves as a rein-.

. mersed in a copper-bath K. As the vat conalone is hardly adequate forforming a perpaper.

tween two rubber pressing-rolls'G, together manent adhesive for themetal deposit and The paper is then fed from Web 0 bewith the band B,and adheres to the latter. The band here passes through a drier T, wherethe pasting material is dried. On issuing therefrom the paper detachesitself from the band and is, wound upon roll W.

Having now fully described my said invention, what I claim by LettersPatent is 1. An improved method of making metal paper byelectrodepositing a film of metal upon a continuously-moving metalsurface or endless metal belt, which consists in first treating saidbelt with a solution of alkali-metal trisulfid and water, then exposingit to the action of an electric current in a galvanic metal-depositingbath, applying an agglutinant t0 the electrodeposited metal andtransferring said electrodeposited met-a1 upon a paper web by windingsaid paper upon the belt and then stripping metal and paper from thebelt, substantially as described. 2. An-improved method of making metalpaper by electrodepositing a film of metal upon' a continuously-movingmetal surface or endless metal belt, which cohsists in first polishingthe surface of the belt and washing the same, then passing it through asolution of alkali-metal trisulfid and water, removing any excess ofmoisture from the belt, then exposing it to the action of an electriccurrent in a galvanic metal-depositing bat-h, applying an agglutinant tothe eleetrodeposited metal and transferring said electrodeposited metalupon a paper web by winding said paper upon the deposit under pressureand then stripping paper and deposit therefrom, substantially asdescribed. 7 1 Y 3. An improved method of making metal paing it -throughan electrolytic web by causing per: by electrodepositing a film of metalupon same, then passing it through a. solutiouof alkali-metal trisulfidand water, removing any excess-of moisture from the belt, then passbathof nickel, next through a. bath of copper and subsequently'washing'thebelt, applying an agglutinant to the electrodeposited metal,transferring said electrodeposited metal upon a paper 7 the paper towind itself upon the belt under pressure and thereafter drying the beltand stripping the metal paper therefrom, substantially as. described.

- 4. An improved method of making metal paper by electrodepositing afilm of metal upon a continuously-moving metal surface or endless metalbelt having ornamental figures or designs engraved thereon, whichconsists in first preparing said belt by polishing and washing the same,then passing it through a solution of alkali-metal trisulfid and water,

removing any excess of moisture from the belt, then passing it throughan electrolytic bathof nickel, next through a bath of copper, so timingthe treatment as to obtain a relatively thicker layer of copper, washingthe belt, applying an agglutinant to the electrodeposited metal,transferring said electr0de-' posited metal upon a paper web by causingthe paper to wind itself upon the belt under pressure and thereafterdrying the belt and stripping the metal paper therefrom, substantiallyas described. In testimony whereof I affix my, signature in presence oftwo witnesses.

, CARL ENDRUWEI'P. Witnesses: e

ALFRED BORN, EMIL 'SoHfi'TzE.

